Rubber-tire-repair vulcanizer.



s. LE F. VARVH.,

iifiBER TIRE REPAIR VULCANIZER.

APPLICATION FILED SEPT. 7, 191?.

Patented Feb. 25, 1919.

lll/14A @l llmllmml I l mmlunn UmTnDsTATns SIDNEY L FVRE VARVEL, oFSYDNEY,-

'ro WILLIAM ARCHIBALD WINDEYER.

PATENT OFF 1i JOHN DAvYs, ALL or SYDNEY, AUSTRALIA.

Specification o To all whom it may conce/rn:

Be it known that I, SIDNEY L Fvnn VAnvEL, subject of the Kingr of GreatBritain and Ireland, residing' at 18 Bridge street, Sydney, New SouthWales. Australia, have invented new and useful Improvements inRubber-Tire-Repair Vulcanizers. of which the following is aspecilication.

My invention relates to apparatus for vulcanizingrI rubber tire andpneumatic tube repairs, and it consists in a vulcanizing plate withinthe body of which is incased an electrical heating; device adapted to besupplied with velectric current from a low voltage storage batteryJforming part ot a car lightingr starting' or ignition system, as willbe hereinafter particularly descrihed.

The invention has been devised with the object of providing a vulcanizerot negligible weightand very small dimensions which een be carriedconveniently and put into and out ot service rapidly. and which willmaintcin a predetermined vulcanizing' temperature on a. patch or repairwithout necessity of attention or adjustment or control by therinostatsor other accessory fittings. The apparatus is provided with certainattachments and is constructed in a shape which facilitates the makingof tread repairs and the patching of tubes n situ or 0n a motor wheel.

The invention is hereinafter described with reference to the annexedsheet ot drawings` in which Figure 1 Ais a perspective, view showing aportion of a pneumatic tired wheel with the vulcanizer set on the tire.as for the repair of a tread cut. by means of a spring clamp belt, andshowing also diagrammatically electrical connections from the heaterresistance wires in the vuleanizer toa 6-volt'ucar battery; Fig. Z is ahalved plan and horizontal section ol the vulcanizer; Fig. 3 is atransverse section through the. vulcanizer. with one ot the vulcanizingplates and its insulating backing shown in side elevation; Fig. 4 is aplan of the heater element, as it appears when removed from thevulcanize'r; Fig. 5 is a transverse section through a nodiiied form ofthe vulcanizer. as when it ismade with only one vulcanizer plate insteadof two vulcanizing plates as in Figs. l, 2 and 3; and Fig. 6 is afragment transverse section on enlarged scale,

RUBSER-TIREREPAIR VULCANIZER.

f Letters Patent. Patented Feb. 25, MMM.

r delineation med september 7, 1917. serial 110.190,268.

showing the structure of the heater element and its bedding and backing.

Ordinarily, the vulcanizer is constructed with two vulcanizer plates,one on either side of it, one concaved and the other tlat on the tace,and separate heater elements for these plates and independent terminalconnections for the battery wires, so that either elen'lent. and itsplate may be put in service as required. The heatingcapacity of theresistance wires is calculated ,with ne lation to the voltage of thestorage battery current to insure maintenance of the correct vulcanizingtemperature at the plate surface when the vulcanizer isset on a tire asshown in Fig. l.

l is the outer member or cover of a pneumatic tire, Q the wheel rim, 3 aclamp strap, 4 a heliczl springconnecting the butt end of the strap 3 toa. linger 5 projecting from the lug 6 which is integral with one side ofthe vulcanizer body'lO. The other ent 3a of the strap 3 is perforated atintervals and so adapted to be engaged on the claw Son the body lug 7,which corresponds with the body lug G on the outer sideiot' thevulcanizer body. llt-l2 are terminal screws on one end of the bodycasting l0, and 13--14 are similar screws on the other end ot' thatcasting. These screws respectively form pairs adapted to be wired up asshown at 15V-i6 to a storage battery 17. 'lhe screws ll i 'd l2 areconnected inte riorly ot t e v al=` .nizer body with resistance wiresembedded in the heater element associated with the vulcanizer plate 20,while the screws l?) and 14 are similarly connected up to the heaterelement associated with. the plate 19 are plates of balelite, h i fiber.or similar heat and electrical insti.. ing material interposed betweenthe body casting tively. said plates being secured to the body casting'by screws 31. A septum i8 in the body Acastingr et the double type etvulcaniaei-serves to separate the tting on one side of said body fromthose ony the other side lof it. The vulcanizer plates are prei'- erablyconstructed of copper which may be nickeledl on the surface. Each plateis preferablv backed with lead as shown at 221 and the heater units aresetbehind the lead backing's. The heater Y.units yeach consist l() andthe plates 20 and 32 `respecy of a mica sheet 24 through whichresistance wires 23 are sewn, for instance in the manner shown in Fig.4, and led over the under face of same. Two cover pieces 22 of mica areset between the wires 23 and the lead backing'21. An asbestos backingsheet 25 is set on top of the mica plate 24. Instead of asbestos aninsulating heat resisting cement such as alundum may be used. Theseseveral parts 22, 23, 24 and 25 are compacted between the insulatingplates 19 and the lead backings 21 on the inner side of the vulcanizingplates, and are located and secured tightly together when the screws 31are driven home. The wire ends 26 and 27 are wound around the Contactscrews 29 and 30 which are embedded in the insulating plate 19. Contactsprings 40 and 41 are also secured by the screws 29 and 30, and thesecontact springs are engaged by the ends of the binding studs 46 and 47on the terminals 11, 12, 13 and 14 respectively. The studs 4G and 47 arethimbled or'have a clearance as shown so that they do not establish anelectrical contact with the metallic body portion 1() of the vulcanizer.They are mounted externally on a face insulating plate 49 and in-Yternally are screwed through the insulating at that temperature. as longas current Hows ythrough the circuit from the battery 17.

The hollow faced plate is provided for the purpose of making a contactover a relatively large area, that is to say a repair up to about 2inches in length,

AWhereas the flat pad is used for punctures and smaller repairs. llt isconvenient to fit the vulcanizer with the two faces so as -to facilitatevulcanizing work, but Where a fiat face or a concave face only isrequired, the vuleanizer may be constructed single sided as in Fig. 5,with one face only; in that case the binding screws 44-45 for thebattery circuit wires are located in the back of the vulcanizer insteadof in the ends thereof as shown in Figs. 1 and 2.

A vulcanizer constructed according to this invention lnay'beconveniently carried in the pocket and can be used for roadsiderepairswith a facility and rapidity quite impossible with any form offire heated vulcanizer. v

`What I claim as my invention and desire to secure 'hy Letters Patent isA vulcanizer comprising a hollow body portion having lugs for attachmenton Opposite sides, an exchangeable flanged hollow vulcanizer plate ofcopper or the like provided with a lead backing, means holding saidvulcanizer plate in position on 'said body portion, a heat insulatingplate be tween the flange of said vulcanizer plate and said bodyportion, contact Screws placed in said insulating plate, a heatresisting insulating carrier backed by heat insulating substancearranged in the hollow` space of .said vulcanizer plate, an electricalresistant-c `wire supported by said insulating carrier, and having itsends connected to said contact screws, binding posts provided on theoutside of said body portion, with a springs secured by said contactscrews and forming the electrical connections from the said contactscrews to the said binding posts, and an adjustable clamp strap adaptedto be fastened to the lugs o n the body portion. ln testimony whereof Ihave signedvmy naine to this specification. I

sInNEY La raven VARVEL. Witnesses l'l. C. CAMPBELL, W. J. DAVIS.

clearance around them, contact

